Combination hot water and steam heater



OCL'Z7, 1942. ROSE 2,300,010

COMBINATION HOT WATER AND STEAM HEATER Filed Sept. 12, 1938 4Sheets-Sheet 1 m an I.

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Aha/9y R055 7 BY 15. kt W ATTORNEY 00.11, 1942. H. ROSE 2,300,010

COMBINATION HOT WATER AND STEAM HEATER Filed Sept. 12, 1938 4Sheets-Sheet 2' INVENTOR. F149; YQOSE T? 'ORNEY Oct. 27, 1942.

H. ROSE 2,300,010

COMBINATION HOT WATER. AND STEAM HEATER Filed Septf 12, 1938 4Sheets-Sheet 3 Q7 3/ Q9 55 /os 26 f /25 3/ !I/// h 1/ 45 IIII uvvmvron.HARRY/13085 A TTORNE Y mat-27,1942. H. ROSE 2,300,010

COMBINATION HOT WATER AND STEAM HEATER Filed Sept. 12, 1958 4Sheets-Sheet 4 uvmymn BY HAQQY 9085 X7. 7

ATTORNEY Patented Oct. 27, 1942 UNITED STATES PATENT OFFICE COMBINATIONHOT WATER AND STEAM ATER 2 Claims.

This invention relates to a combination hot water and steam heater, andhas more especial reference to a heating apparatus for warming theinterior space of an automotive vehicle body, such, for example, as apleasure vehicle, taxicab, bus, or truck.

An object of the invention is to provide an automotive vehicle heatingapparatus which will include a construction and arrangement fordiverting fluid-cooling or circulating medium from the cooling orcirculating system of the internal combustion engine of the vehicle andutilizing the diverted fluid-cooling or circulating medium in saidheating apparatus as heated fluid medium thereof to the purpose ofwarming the air of an interior space to be heated of the automotivevehicle under certain conditions of use, and which construction andarrangement will also be capable, under other conditions of use of theheating apparatus and independently of said internal combustion enginecooling or circulating system, of causing heat to be imparted to aportion of said fluid-cooling or circulating medium at or adjacent tosaid heating apparatus and causing said heated portion of thefluid-cooling or circulating medium to be employed as heated fluidmedium of the heating apparatus to the purpose of warming said air ofsaid interior space of the automotive vehicle.

A further object is to provide a heating apparatus of the character asstated, which will include a construction and arrangement for at timesemploying fluid-cooling or circulating medium from and heated by andcirculated by the cooling or circulating system of an internalcombustion engine as heated fluid medium utilized in said heatingapparatus for heating purposes and for at times utilizing heated fluidmedium in said heating apparatus for heating purposes, desirably, butnot necessarily, in circuit or communication with the cooling orcirculating system of said internal combustion engine, heated andcirculated by means other than said cooling or circulating system, as,for example, by the employment of a heater including a fuel burner.

A further object is to provide a combination hot water and steam heatingapparatus, more especially useful to the purpose of Warming air in thebody or an interior space of an automotive vehicle, including mechanismthrough the instrumentality of Which the heating apparatus can at timesutilize fluid-cooling or circulating medium from the cooling orcirculating system of the internal combustion engine of the automotivevehicle having said body or space to be warmed,

after the general manner as now in vogue, to the purpose of providingheated fluid medium for air heating purposes of said heating apparatus,and can at other times utilize a special heater, as, for example, aheater employing a fuel burner,

such as a gasoline or other fluid fuel heater, or any convenient fuelheater or burner, to the purpose of providing heated fluid medium forair heating purposes of the heating apparatus, which last mentionedheated fluid medium may be, but need not necessarily be, constituted asa portion of the fluid-cooling or circulating medium of the cooling orcirculating system of said internal combustion engine.

A further object is to provide an automotive vehicle heating apparatusas set forth which can be constituted as an ordinary hot water heater asnow of commerce, including mechanism for diverting fluid-coolingorcirculating medium from the cooling or circulating system of theinternal combustion engine of said automotive vehicle and utilizing thediverted fluid-cooling or circulating medium in the heating apparatus asheated fluid medium thereof for warming an interior space of saidautomotivevehicle, to which has been added mechanism, as, for example, aheater employing a gasoline or other burner as a part thereof, adaptedto the purpose of providing, independently of said internal combustionengine cooling or circulating system as such, heated fluid medium forsaid heating apparatus to be utilized therein to the purpose of warmingsaid interior space to be heated of the automotive vehicle, and in whichheating apparatus the two different mechanisms mentioned will beoperative at different times, and will not be operative at the sametime, to provide or supply heated fluid medium to said heatingapparatus.

A further object is to provide an automotive vehicle heating apparatusat set forth which selectively can be employed as a hot water heater oftype now of commerce receiving heated fluid medium for heating theheating apparatus from the cooling or circulating system of an internalcombustion engine, or as a heated fluid medium or steam heater receivingheated fluid medium or steam from a source other than said internalcombustion engine cooling or circulating system as such, as, forexample, from a boiler heated by the burning of fuel.

A further object is to provide a heating apparatus of the presentcharacter wherein will be incorporated various improved features andcharacteristics of construction novel both as individual entities of theheating apparatus and in combination with each other.

And a further object is to provide a fuel or fluid fuel or gasolineheated steam or fluid medium heating apparatus, especially useful to thepurpose of warming the interior space of an automotive, vehicle, whichwill be of novel and improved construction and can be employed as anindependent entity or unit for Warming or heating purposes.

With the above objects in view, as well as others which will appear asthe specification proceeds, the invention comprises the construction,arrangement and combination of parts as now to be fully described and ashereinafter to be specifically claimed, it being understood that thedisclosure herein is merely illustrative and intended in no way in alimiting sense, changes in details of construction and arrangement ofparts being permissible so long as within the spirit of the inventionand the scope of the claims which follow.

In the accompanying drawings forming a part of this specification,

Fig. 1 is a side elevational view of a heating apparatus having thefeatures and characteristics of the invention incorporated therein,disclosing said heating apparatus as when applied to an automotiveVehicle;

Fig. 2 is an enlarged vertical sectional view, partially in elevationand partially broken away, of the heating apparatus of Fig. 1;

Fig. 3 is a top plan view, partially in section and partially brokenaway, of the heating apparatus of Fig. 2;

Fig. 4 is a vertical sectional view, taken on line 4 in Fig. 3;

Fig. 5 is a vertical sectional view, taken on line 5-5 in Fig. 3;

Fig. 6 is a horizontal sectional view, taken as on line 6-45 in Fig. 4

Fig. '7 is a horizontal sectional view, taken as on line 1-1 in Fig. 5;

Fig. 8 is 'a horizontal sectional view, taken as on line 38 in Fig. 5;

Fig. 9 is a rear elevational View, partially in section and partiallybroken away, of a heating apparatus of modified construction madeaccording to the invention, as said heating apparatus would appear whenviewed from the left hand side of Fig. 10;

Fig. 10 is a side elevational view, partially in section and partiallybroken away, of the heating apparatus of Fig. 9, as said heatingapparatus would appear when viewed from the right hand side of said Fig.9; and

Fig. 11 is a rear elevational view, partially broken away, of a heatingapparatus of further modified construction including features andcharacteristics of the invention, the present view being on a scaleconsiderably smaller than that of Figs. 2, 3, 9 and 10.

With respect to the drawings and the numerals of reference thereon, i5denotes the engine jacket, is the fluid-cooling radiator, H the fluidconnection from the jacket !5 to the radiator, It the fiuid connectionfrom said radiator to said jacket, and [9 represents, generally, theusual pump for the fluid-cooling medium of an automotive vehicle of anyordinary or preferred character, such as a pleasure vehicle, taxicab,bus or truck. Ordinarily, the fluid-cooling medium is circulated by thepump l9 from the jacket i5 through the connection I? to the radiator l6,and back to the jacket from the radiator through the connection [8.

In Figs. 1, 2 and 3 of the drawings, the novel and improved heatingapparatus, designated 21 I, is mounted partially within the body 22 ofthe automotive vehicle at and partially beneath the hood 23 of saidautomotive vehicle, numeral 24 indicating the dash of the vehicle uponwhich the heating apparatus is supported in a manner to be set forth. Asalso to be made clear, suitable fluid conveying connections are providedwhereby a part or all of the fluid-cooling or circulating medium for theinternal combustion engine of said vehicle is diverted and utilized asheated fluid medium for supplying heat to said heating apparatus.

The heating apparatus 2! includes a heating unit 25 situated within thevehicle body 22, and said heating unit 25 includes a fluid-heated,airheating core consisting of an upper fluid, water or steam tank 26, alower fluid, water or steam tank 21, a plurality of spaced apart fluid,water or steam tubes, each denoted 28, extending between said tanks 26and 21, and fins, each indicated 29, in spaced relation upon said tubes28 and extending transversely thereof. The fluid, water or steam tubes28 are arranged in two spaced apart tanks or sets of tubes. Asdisclosed, each tube 28 is relatively flat and wide, said tubesdesirably being of width slightly less than that of the tanks 26 and 21.Said tanks desirably are of equal length and width. Outermost tubes 26of the different banks or sets of tubes will be arranged adjacent theopposite end portions of the tanks and all of said tubes will beparallelly arranged.

Each of the fluid, water or steam tanks 26 and 27 desirably may consistof a header plate into which the adjacent ends of the tubes 28 aresuitably fastened in fluid-tight fashion, as by soldering or otherwise,and a housing member 3| suitably fastened, also in fluid-tight fashion,as by soldering .or otherwise, to the marginal portions of thecorresponding header plate 33.

The fins 29 desirably are of relatively small thickness and of widthslightly greater than the width of the tubes, which may be of equalwidth. The construction will include longer fins adjacent the outer endportions of the core of the heating unit 25 and shorter fins between thetwo sets of longer fins. The longer fins will be of length about equalto the length of each tank 26, 21, and each shorter fin 29 will bearranged upon the tubes 28 of but a single bank or set of tubes. Theforward and rearward edges, respectively, of the fins desirablyterminate in a single plane, as do also the outer edges, respectively,of said fins.

The inner edges of the shorter fins, between the two sets of longerfins, terminate at about the location of the innermost tubes 28, 28 ofthe different banks or sets of tubes. The innermost fins of the two setsof longer fins are in spaced rela tion to each other, and thus arectangular space. represented 32, in the core and between the banks orsets of tubes and surrounded by the longer and shorter fins is provided,for a purpose to be made clear.

The tubes 28 of the different banks or sets of tubes are desirablyspaced at equal distances from each other, and each of said tubesdesirably is perpendicular to each header plate 35, with the widths ofthe tubes preferably disposed perpendicularly to a plane extendinglongitudinally and perpendicularly through both header plates.

The fins 29, including both the longer and shorter fins, desirably arelikewise spaced at equal distances from each other, with the uppermostand lowermost fins being spaced at this same distance from the headerplates 39, as best disclosed in Fig. 2. Said fins 29 may be associatedwith the tubes 23, before said tubes are secured to the header plates3:), by providing openings through the fins of size to fit the tubes andslidin said fins over said tubes, or sliding the tubes through theopenings in the fins. Preferably, the fins are secured to the tubes, asby soldering or otherwise,

to be in intimate heat conveying contact therewith.

When a core constructed as described is completed, it comprises agenerally rectilinear article, said article having the opposite endportions thereof, constituted by the housing members 3| of the tanks 26and 21, constructed along somewhat curvilinear lines.

A supporting structure for the heating unit is adapted to be assembledwith a single tubular or pipe support or connection for said heatingunit. The fluid, water or steam tank 26 cnveniently carries at theinterior thereof a suit able bracket 33, said bracket being suitablysecured to the upper Wall of the upper housing member 3|. A downwardlyextending flange 34 of the bracket 33 includes a tapped hole 35 adjacentthe rearward wall of said upper housing member. A tubular or pipesupport or connection 36 has a thereaded end portion 3'! turned into thetapped hole 35, as disclosed very clearly in Fig. 2. The tubular or pipesupport or connection 36 extends through an opening in the rearward wallof the upper housing member, and a fluid-tight-seal is provided betweensaid opening and said tubular or pipe support or connection, as bysoldering or otherwise. The bracket 33 desirably is constructed so as tospread over a considerable area on the inside of the housing member ofthe upper tank 26, to provide a relatively wide supporting surface forthe heating unit 25. Also, the bracket 33 and the tubular or pipesupport or connection 36 are of quite rigid structure, and when saidtubular or pipe support or connection is rigidly secured in the rearwardwall of the upper housing member 3|, as by soldering, said tubular orpipe support or connection is obviously fixed against turning movementin the bracket 33.

Numeral 38 denotes an electric motor within the space 32 of the heatingcore, said electric motor having a blower or fan 39 fixed upon the motorshaft 43. The electric motor is of dimensions to nicely fit into thespace 32, and thearrangement is such that the blower or fan 39 will besituated adjacent the core in fairly close relation thereto, about asillustrated in Fig. 2. When electric power is applied from a source (notshown), such as the battery of an automotive vehicle, to the motor 38,is driven to force air through the core, past and over the tubes andfins thereof. The electric motor may be secured in and to the core ofthe heating unit 25 in any suitable and convenient manner.

A usual casing 4| is adapted to contain the assembly of the core, motorand blower or fan. Said casing. may more or less freely receive saidcore. As illustrated, the casing is a box-like member consisting of aforward shell 42 and a rearward shell 43, which shells may have a telescoping fit and be secured in fixed relation to each other in anyconvenient manner. The forward shell 42 will of course include an openfront for the heating unit, and said open front may include a grille orair deflector of any suitable construction and design. The shells 42 and43 together constitute a casing including straight side walls,curvilinear upper and lower end walls, and front wall perpendicular tosaid side and end walls of the casing, said front wall being cut away oropen, as before stated. The cut-away or open portion of the front wallof the core casing may desirably be of area about equal to, or a littleless than, and approximately. similar to, the overall the blower or fan39 area covered by the forward surfaces or edges of the fins 29. Theback of the casing 4|, constituted by the rearward shell 43, includes aflange 44 parallel with the front wall of said casing, said flange 44,together with the adjacent portions of said rearward shell 43,constituting a shroud for the blower or fan 39 and including a circularopening 45 about said blower or fan in spaced relation thereto. The coreis inserted in the casing 4| so that said core is situated centrally ofthe cut-away portion or opening in the front wall of said casingdesirably to completely cover said cutaway portion or opening.

The tubular or pipe support or connectio 36 constitutes cooperatingmeans through the instrumentality of which the heating unit 25 can bemounted upon a fixed part of the automotive vehicle body. As disclosedvery clearly in Figs. 1, 2 and 3, the outer portion 46 of the tubular orpipe support 36 is externally threaded and passes through a hole in thedash 24 of the automotive vehicle, said hole closely fitting upon saidtubular or pipe support. An extension 41 of said threaded outer portion46 of the tubular or pipe support 36 is disposed beneath the hood 23, atthe side of the dash 24 opposite the heating unit 25. Said tubular orpipe support is rigidly secured in the dash of the automotive vehicle byadjustable supporting nuts 48 upon the tubular or pipe support, therebeing one nut 48 at each side of the dash, each of which nuts can beturned up against a washer 49 between the nut and the dash. The tubularor pipe support 36 passes through an opening in the flange 44, and aspacing sleeve 56 upon said tubular or pipe support 36 has one of itsends engaging the rearward surface of the upper housing member 3| of thecore and its other end engaging said flange 44. A second spacing sleeve5| upon the tubular or pipe support 36 has one'of its ends engaging theflange 44 and its other end engaging the adjacent supporting nut 48. Itwill be evident that the supporting nuts 43 can be adjusted to situatethe tubular or pipe support 36 in the vehicle dash 24 so that the spacinsleeves 50 and 5| fix the relation of the rearwardshell 43, as well asthe relation of the casing 4| consisting of the secured together forwardand rearward shells 42 and 43, to the dash 24. The arrangement asdescribed makes provision for the rigid securing of the core and itscasing, with appurtenances, upon the automotive vehicle body, interiorlythereof. The weight of the casing assembly, including the electric motorand blower or fan, the grille or air deflector and the shroud is maderigid with the core, which carries said Weight back to the tubular orpipe support 36.

Numeral 52 denotes a bracket or member integral with a lower portion ofthe rearward shell 43 and cooperating with the tubular or pipe support36 to fixedly attach the heating unit to the dash 24. Said bracket ormember 52 engages the dash and may be secured thereto in any suitableand convenient manner. A tube or pipe 53 is secured in fluid-tightfashion upon a hollow neck 54 extending rearwardly from the rearwardwall of the lower housing member 3|. 6 An outer portion of said hollowneck 54 passes through an opening in the flange 44, and said tube orpipe 53 extends through an opening 55 in the bracket or member 52 andthrough an opening 56 in the dash 24 to position beneath the hood 23, atthe side of said dash opposite the heating unit 25.

A'hot water heater of commerce constructed as hereinbefore describedadditionally includes a fluid or water connection extending from theengine jacket IE to the tube or pipe 53 and a fluid or water connectionextending from the tubular or pipe support 36 to the connection it.However, in the present construction, the fluid connections from saidengine jacket l5 to said tube or pipe 53 and from said tubular or pipesupport 35 to said connection it? are by way of a mechanism 59 ofstructure and for purposes to be described. As shown, a fluid or waterpipe 5'! constitutes a connection between the engine jacket 85 and themechanism 59 and said mechanism is connected to the tube or pipe 53 tobe capable of communicating therewith at a side of the mechanismopposite said fluid or water pipe 577, and a fluid or water pipe 58constitutes a connection between said mechanism 59 and the connection l8and the tubular or pipe support 36 is connected to the mechanism to becapable of communicating therewith at a side of said mechanism oppositesaid fluid or water pipe 58.

Were the novel and improved mechanism 59 omitted from the h atingapparatus, and, instead, the fluid or water pipe 5? directly connectedto the tube or pipe 53 in communicating relation therewith and thetubular or pipe support 36 directly connected to the fluid or water pipe58 in communicating relation therewith, said heating apparatus would beoperative in the manner as follows. Assuming the internal combustionengine of the automotive vehicle 251 to be in operation, there would bea substantial flow of heated fluid or water from the jacket l5 throughthe fluid or water pipe 5'! and the tube or pipe 53 to the core of theheating unit and back to said jacket l5 through the tubular or pipesupport or connection 36, the fluid or water pipe 53 and the connectionis. Any other suitable and preferred arrangement for circulating all orany desired portion of the heated fluid or Water of the engine coolingsystem through the core of the heating unit 25 can of course besubstituted for the arrangement disclosed. As illustrated, the flow ofheated fluid or water from and back to the engine jacket is the heatingunit core. The flow from and back to the engine jacket could of coursebe downward through the core of the heating unit, the heated fluid orwater in such an event passing through a suitable connection attached tothe tubular or pipe support or connection 3!; to here enter the core andleaving said core by way of the tube or pipe 53 and a suitableconnection attached thereto. The heated fluid or water upon entering thetube or pipe 53 passes into the lower tank Zl. Thence heated fluid orwater passes upwardly through each of the relatively flat and wide tubes28 to the upper tank 25. And from said tank 25 the heated fluid or waterpasses out of the heating unit 25 through the tubular or pipe support orconnection 35. While traveling through the tubes 28, the heated fluid orwater gives off heat which is absorbed by the fins 29, and, by rotationof the blower or fan 39 to force air past and over the tubes and fins,the air is caused to be heated and distributed throughout the vehiclebody.

The mechanism 59 by way of which the engine jacket l5 and the fluid orwater pipe 51 are connected to the tube or pipe 53 and the tubular orpipe support 36 is connected to the fluid or water pipe 58 itselfattached to the connection it! is disclosed in Figs. 1, 2 and 3 assituated beneath the hood 23, supported by the externally threadedextension 4"! of the tubular or pipe supupward through port 38, andassociated with the tube or pipe 3. A purpose of said mechanism 59 is toprovide or supply heated fluid medium or steam for the heating unit 25and to cause the provided or supplied heated fluid medium or steam to beforced or fed to said heating unit independently of the cooling orcirculating system as such of the internal combustion engine of theautomotive vehicle 2! and a further purpose of the mechanism 59 is torender said internal combustion engine cooling or circulating system assuch incapable of forcing or feeding heated fluid medium to the heatingunit 25 while said mechanism is causing heated fluid medium or steam tobe forced or fed to said heating unit, as well as to render themechanism 59 itself incapable of causing heated fluid medium or steam tobe forced to the heating unit 25 while this is being supplied orprovided with heated fluid medium from the cooling or circulating systemof the internal combustion engine of said automotive vehicle 2b.

The mechanism 59 includes a pair of control chambers constituted as anupper control chamber Bil and a lower control chamber iii. A horizontalpartition 62 between the control chambers 6i! and 6! separates saidcontrol chambers from each other, and a small opening 63 through saidpartition it? affords limited communication between the control chambers60 and 6| to a purpose to be made clear. The control chambers 60 and Elare provided by an upper and a lower bellows housing, denoted 64 and 65,respectively, and each of said bellows housings 64 and 65 includes ahorizontal flange 66 at the end thereof adjacent the horizontalpartition 52. Said partition is clamped in fluid-tight fashion betweensaid horizontal flanges 65, as by screw bolts 67, and said screw boltsrigidly secure the bellows housings 64 and 65 to each other.

The upper bellows housing 64 includes an upwardly extending, desirablycylindrical, hollow neck 68 at the upper portion thereof, which neck 68is adapted to communicated at an upper portion thereof with an integral,hollow, horizontal boss or protuberance 69 alined with the externallythreaded extension 4! of the tubular or pipe sup port 36 and rigidilysecured to the extension 41 in communicating relation therewith by atubular element 70 in surrounding relation to both said boss orprotuberance 69 and said extension 41. That is, the tubular element 7!]rigidly secures the upper bellows housing 64 to the extension 41 andthus mounts the mechanism 59 upon the tubular or pipe support 35, andsaid tubular element In is of construction and is composed of materialto constitute a fluid seal between said extension 41 and said boss orprotuberance 69. Said neck 68 is also joined with a second integral,hollow, horizontal boss or protuberance H at the elevation of the bossor protuberance 69 and disposed substantially ninety degrees from saidboss or protuberance E9 in the disclosure as made. The bosses orprotuberances 69 and H are adapted to communicate with each other by wayof an upper portion of said hollow neck 63. The upper end of the hollowneck 68, directly above the bosses or protuberances 69 and ll, isclosed-by a horizontal piece 72. Stated differently, the hollow neck 68is open at its lower portion to the upper control chamber -60 andincludes the hollow bosses or protuberances 69 and H at its upperportion, but otherwise said hollow neck 68 is closed. The fluid or Waterpipe 58 is connected to a hollow boss or protuberance 13 upon andintegral with the upper bellows housing 64, below the neck 68, incommunicating relation to the upper control chamber 60.

The lower bellows housing 65 includes a downwardly extending, desirablycylindrical, hollow neck 14 at the lower portion thereof, which neck 14is adapted to communicate at a lower portion thereof with an integral,hollow, horizontal boss or protuberance 15 alined with the tube or pipe53. As disclosed, the boss or protuberance 15 is fitted in fluid-tightfashion into the adjacent end of said tube or pipe 53. The constructionand arrangement is such that said boss or protuberance 15 and the tubeor pipe 53 cooperate with the tubular or pipe support 36 and the boss orprotuberance 69 to cause the mechanism 58 to be stably mounted upon saidtubular or pipe support 36, itself supported upon the dash 24. Said neck14 is also joined with a second integral, hollow, horizontal boss orprotuberance 18 at the elevation of the boss or protuberance 15. anddisposed substantially ninety degrees from said boss or protuberance 15in the disclosure as made. The bosses or protuberances 15 and 16 areadapted to communicate with each other by way of a lower portion of saidhollow neck 14. The lower end of the hollow neck 14, directly below thebosses or protuberances 15, and 16, is closed by a horizontal piece 11.hollow neck 14 is open at its upper portion to the lower control chamber6| and includes the hollow bosses or protuberances 15 and 16 at itslower portion, but otherwise said hollow neck 14 is closed. The fluid orwater pipe 51 is connected to a hollow boss or protuberance 18 upon andintegral with the lower bellows housing 65, above the neck 14, incommunicating relation to the lower control chamber 8|.

The partition 62 fixedly supports the lower portion of an upper controlbellows 19 which is situated in the upper control chamber 60 in spacedrelation to the upper bellows housing 64 and extends upwardly from saidpartition 62. The upper end of the upper control bellows 18 is closedand fixedly supports an upper valve stem and control plunger 80 whichextends upwardly through the hollow neck 68 in spaced relation thereto.An upper portion of the upper valve stem and control plunger 88 extendsthrough said horizontal piece 12, as well as through an upstanding stud8| integral with the horizontal piece 12, and is slidably guided in saidhorizontal piece and said upstanding stud. The arrangement is such thatthe horizontal piece 12 and the upstanding stud 81 are fitted about thevalve stem and control plunger 80 in fluid-tight maner. An intermediateportion of the upper valve stem and control plunger 88 fixedly carries agenerally L-shape valve 82 including a desirably circular, horizontalportion 83 thereof adapted to shut-off communication through the hollowneck 68 between the boss or protuberance 69 and the control chamber 88when the upper control bellows is contracted, as in Fig. 4, and alsoincluding a vertical portion 84 thereof adapted to shut offcommunication by way of the upper portion of said neck 68 between theboss or protuberance 1| and said boss or protuberance 69 when said upperbellows 18 is expanded, as in Fig. 2. As shown the horizontal portion 83of the L-shape valve 82 engages the horizontal piece 12 when the uppercontrol bellows 19 is expanded to position so that the vertical portion84 of said L- shape valve 82 is in shutting-01f relation to the boss orprotuberance 1i, and said horizontal piece Stated differently, the

12 constitutes a stop which limits upward movement of the L-shape valve82 and expanding action of the upper control bellows 19. The circular,horizontal portion 83 of said L-shape valve 82 is situated in thehollow, cylindrical neck 68, between the bosses or protuberances 88, 11and the upper control chamber 60, when the upper control bellows 19 iscontracted, to completely shut off communication between said boss orprotuberance 68 and the fluid or water pipe 58. Said upper controlbellows 19 of course expands upon being heated and contracts upon beingcooled.

The partition 82 also fixedly supports the upper portion of a lowercontrol bellows 85 which is situated in the lower control chamber 6| inspaced relation to the lower bellows housing 65 and extends downwardlyirom said partition 62. The lower end of the lower control bellows 85 isclosed and fixedly supports a lower valve stem 86 which extendsdownwardly through the hollow neck 14 in spaced relation thereto. Thelower end of the lower valve stem 88 fixedly carries a generallyL-shaped valve 81 including a desirably circular, horizontal portion 88thereof adapted to shut off communication through the neck 14 betweenthe control chamber BI and the boss or protuberance 15 when the lowercontrol bellows 85 is contracted, as in Fig. 4, and also including avertical portion 89 thereof adapted to shut oil communication by way ofthe lower portion of said neck 14 between said boss or protuberance 15and the boss or protuberance 16 when said lower control bellows 85 isexpanded, as in Fig. 2. As shown, the horizontal portion 88 of theL-shape valve 81 engages the horizontal piece 11 when the lower controlvalve 85 is expanded to position so that the vertical portion 88 of saidL-shape valve 81 is in shutting-off relation to the boss or protuberance16, and said horizontal piece 11 constitutes a stop which limitsdownward movement of the L-shape valve 81 and expanding action of thelower control bellows 83. The circular, horizontal portion 88 of said L-shape control valve 81 is situated in the hollow, cylindrical neck 14,between the lower control chamber 6| and the bosses or protuberances 15,16, when the lower control bellows 85 is contracted, to completely shutoff communication between the fluid or water pipe 51 and the boss orprotuberance 15. Said lower control bellows 85 of course expands uponbeing heated and contracts upon being cooled.

It will be obvious that when the control bellows 19 and are situated asin Fig. 2, there will be a communicating connection by way of the lowerbellows housing 65 between the fluid or water pipe 51 and the tube orpipe 58, as well as a communicating connection by way of the upperbellows housing 64 between the tubular or pipe support 36 and the fluidor water pipe 58. It will also be'obvious that when the control bellows18 and 85 are situated as in Fig. 4, there will be a communicatingconnection by way of the upper portion of the-hollow neck 68 between theboss or protuberance "H and the boss or protuberance 69 leading to thetubular or pipe support or connection 36, as well as a communicatingconnection by way of the lower portion of the hollow neck 14 between theboss or protuberance 15 leading from the tube or pipe 53 and the boss orprotuberance 16.

The heating apparatus incorporates a fuel or fluid fuel heating devicewhich in the disclosure as made is associated or assembled with thebosses or protuberances II and 79 upon the upper and lower hollow necksG9 and M, respectively. Said heating device includes a boiler consistingof an inner boiler casting 99, an intermediate boiler sleeve 9| and anouter boiler shell 92, and also includes a burner 93 for causing theboiler to be heated.

The inner boiler casting 99 as shown provides an inner fluid or waterchamber 99 of the boiler. The lower end of the inner chamber 99 isclosed by an expansion plug 95 and the upper end of said inner chamberis closed by a screw plug 99.

The intermediate boiler sleeve 9| has its opposite end portions tightlyfitted upon enlarged end portions, indicated 91 and 98, respectively, ofthe inner boiler casting 99, and the outer surface of said boilercasting is cut away, as indicated at 99, at location between the endportions of the boiler casting to provide flues for hot gases leadingfrom a combustion chamber I90 of the burner 93. As disclosed, saidburner 93 is constituted as a screw plug member threaded in a lower wallof the boiler casting 99 and including a resistance element IOI'situated in the combustion chamber I99, and said combustion chamber issituated directly beneath the expansion plug 95 and above the burner 93and is provided by an The outer boiler shell 92 is situated in spaced,surrounding relation to the boiler sleeve 9|. The lower end portion ofsaid boiler shell 92 is tightly fitted upon an enlarged portion I93 ofthe boiler casting 99 at the outer side of and below the elevation ofthe enlarged end portion 98. The upper end of the boiler shell 92includes a horizontal closure wall I99. The screw plug 99 has anintegral upwardly extending stud I 95 thereon, and the horizontalclosure wall I94 includes an opening I 96 in which said stud I95 issituated in fluid-tight fashion. An upper portion of the stud I95 isdisposed above said closure wall I99. The horizontal closure wall I94 isin spaced relation to the upper ends of the boiler casting 99 and theboiler sleeve 9|. As disclosed, the upper ends of said casting 99 andsaid sleeve 9| terminate in a single horizontal plane. Evidently, theboiler construction as illustrated and as thus far described includeselements, the casting 99, the sleeve 9| and the shell 92, which arerigidly secured together. That is to say, the boiler shell 92 is rigidlysecured upon the boiler casting 90 and the upwardly extending stud I95,itself rigidly secured to said boiler casting, and the boiler sleeve 9|is tightly fitted upon the boiler casting. The lower end of the boilershell 92 includes a horizontal flange I97 which is" secured, as by screwbolts I 99, to a complemental flange I99 upon the boiler casting 99.

An upper portion of the boiler shell 92 communicates with a hollow,horizontal boss or protuberance III] which is integral with said boilershell and is situated just below the horizontal closure wall I94, inalining relation with the boss or protuberance 'II. As disclosed, saidbosses or protuberances II and I II] are rigidly secured together incommunicating, fluid-tight relation to each other. Any suitable andconvenient means can be employed to this purpose. A lower portion of theboiler shell 92 communicates with a hollow, horizontal boss orprotuberance I I I which is integral with said boiler shell and issituated slightly above the enlarged portion I93 of the boiler casting90, in alining relation with the boss or protuberance l9.

integral lower portion I92 of the boiler casting Said bosses orprotuberances I6 and II I are alsorigidly secured together incommunicating, fluid-tight relation to each other by employment of anysuitable and convenient means. 'Thus, the boiler, with appurtenances, isfixedly supported upon the bellows housings 94 and 65, which are, inturn, rigidly secured to each other, rigidly mounted upon the tubular orpipe support 39, and stably assembled with the tube or pipe 53.

The boiler shell 92 and the boiler sleeve 9! together provide an annularwater chamber ||2 between said shell and sleeve and in surroundingrelation to said sleeve. The base or bottom H9 of the annular waterchamber H2 is constituted by material of a lower portion of the boilercasting 90, as will be clear from Figs. 4, 5, 7 and 8. A port II 4 leadsthrough the boiler casting 99 and the boiler sleeve 9| from the upperend of the inner water chamber 94 to an upper portion of the annularfluid or water chamber IIZ. As shown, the port I I4 passes through upperportions of the casting 9D and the sleeve 9| which are tightly fitted toeach other, and is situated at elevationslightly below the elevation ofthe boss or protuberance I I9, substantially at a right angle from saidmentioned boss or protuberance. A port I I5 leads through the boilersleeve 9| and the boiler casting 99 from a, lower portion of the annularfluid or water chamber II2 to the lower end of the inner fluid or waterchamber 94. The port I|5 passes through lower portions of the sleeve 9|and the casting which are tightly fitted to each other, and is situatedat the elevation of the boss or protuberance II I, in alinement withsaid mentioned boss or protuberance.

The flues for hot gases from the combustion chamber I90 which thecut-away portions 99 supply are constructed to provide three passes forthe hot gases before they are removed from intimate contact with theboiler. Stated difierently, the hot gases which pass through the fluestravel first upwardly, then downwardly, and finally upwardly. To thisend, the external surface of the boiler casting 99 includes a set ofoppositely disposed, alining ribs H6, H6 which extend longitudinally ofthe boiler casting from the position of the lower enlarged portion 98 toposition slightly below the upper enlarged portion 91. That is, thelower ends of the oppositely disposed, alining ribs IIS, I I6 meet thelower enlarged portion 98, and the upper ends II! of said ribs extend toposition above the section line 1-! in Fig. 5 and terminate at elevationjust below the section line 88 in said Fig. 5, as will be clear fromFigs. 7 and 8. The outer or side edges of said ribs H6, I I6 meet theinner wall of the boiler sleeve 9| to thus provide a passageway II 8 forhot gases leading upwardly from the combustion chamber I90. As will beseen in Fig, 5, said combustion chamber I99 is in communication with theupwardly leading passageway II8 through a port of passageway H9. Theexternal surface of the boiler casting 99 includes a set of oppositelydisposed, alining ribs I 29, I29 which extend longitudinally of theboiler casting from position slightly above said enlarged portion 98 andmeet the upper enlarged portion 91. The ribs I29, I20 are in spaced,parallel relation to the ribs H6, H6, and the outer or side edges ofsaid ribs I29, I29 meet the inner wall of said boiler sleeve 9| to thusprovide, together with the ribs IIB, II 6, spaced apart passageways I2I,|2| for hot gases leading downwardly between adjacent ribs H6, I29 andH9,

I20, and a passageway I22 leading upwardly from the lower ends I23 ofthe ribs I20, I20 and the passageways I2I, I2I. Th'e ribs H6, H6completely separate the upwardly leading passageway II8 from thedownwardly leading passageways I2I, I2I save at the upper ends II1 ofsaid ribs H6, and the ribs I20, I20 completely separate said downwardlyleading passageways I2I, I2I from the upwardly leading passageway I22save at the lower ends I23 of said ribs I20. An upper portion of theupwardly leading passageway I22 traverses the enlarged part 91 of theboiler casting 90, and the upper end of said upwardly leading passagewayI22 terminates in an outlet I24 for conveying the hot gases from theburner and boiler, which outlet I24 leads upwardly through the screwplug 90 and its stud I05. Stated differently, the course for hot gasesfrom the combustion chamber I and intended to traverse the boiler isupwardly through the port or passageway IIS and the passageway II8,

thence past the upper ends H1, H1 of the ribs H6, H6 and downwardlythrough the passageways I2I, I2I, and thence past the lower ends I23,I23 of the ribs I20, I and upwardly through the passageway I22 and theoutlet I24. In thus passing through the boiler, at location between theinner fluid or water chamber 94 and the outer, fluid or water chamberII2, the hot gases will impart substantially all of their heat to fluidor water in said chambers of the boiler.

A fixture plate I25 is disclosed fastened down against the horizontalpiece 12 and the horizontal closure wall I04. As illustrated, the' piece12 and the closure wall I04 are in a single horizontal plane and thefixture plate I25 is horizontally situated. More explicitly, saidfixture plate I25 includes an opening I26 which snugly receives theupwardly extending stud I05 upon the screw plug 96 and a'nut I21 upontheupper end of said stud I05 fastens the fixture plate down againstsaid closure w-all I04, and said fixture plate also includes an openingI28 which snugly receives the upstanding stud 81 upon the horizontalpiece 12 and a nut I29 upon the upper end of said stud 8| fastens thefixture plate down against said horizontal piece 12. The arrangement asillustrated and described renders all of the fixture plate I25, the studI05 and the stud 8| rigid with each other and assists in causin themechanism 59 to be constituted as a unitary, rigid structure.

The outlet I24 for hot gases communicates by way of a horizontal portI30 in the upwardly extending stud I05 with an exhaust passageway I3Iextending longitudinally through the fixture plate I25, and said exhaustpassageway I3I is adapted to have communicating connection through atube or pipe I32, disclosed in Fig. 1, with the intake manifold of theinternal combustion engine of the automotive vehicle 20. The upper endof the outlet I24 is sealed by a plug I33.

A part I34 of the exhaust passageway I 3| extends diametrically throughthe upstanding stud 8I upon the horizontal piece 12 across the path ofthe upper valve stem and control plunger 80. When the upper controlbellows 19 is expanded, said upper valve stem and control plunger 80 isacross the part I34 of the exhaust passageway I3I, as in Fig. 2, tocompletely shut off communication between the outlet I24 and the intakemanifold, and when said upper control bellows is contracted, the uppervalve stem and control plunger is below and spaced from said part I34 ofsaid exhaust passageway I3I, as in Fig. 4, so

: combustion engine.

that there is communicating connection between said outlet I24 and saidintake manifold.

An inlet pipe I35 leadinginto the combustion chamber I00 is adapted toextend from a carburetor (not shown) for causing fluid fuel, such asgasoline mixed with air, to be drawn or fed into said combustion chamberin response to suction created in the intake manifold when the controlplunger 80 is situated away from or out of the part I34 of the exhaustpassageway'lSI.

The resistance element I3I is adapted to be energized by electricalcurrent from any suitable and convenient source (not shown). A circuitfor said resistance element can include spaced apart, fixed conductingelements I36, I36 insulatively supported upon the lower bellows housingand adapted to be bridged by a movable "conducting element I31insulatively mounted upon a bi-metallic blade I38 having its upper endportion secured, as at I39, upon said lower bellows housing 65. Thearrangement is such that the conductin-g element I-31 is caused to moveoutwardly to break connection between the spaced apart, fixed conductingelements I36, I33 when the temperature ofsaid bi-metalli-c blade I38 isincreased, and is caused to move inwardly to make connection betweensaid fixed contact elements I36, I30 when the temperature of saidbi-metallic blade is decreased. When theswitch including the con.ducting elements I36, I31, I36 is closed the resistance element II isenergized, and when said switch is open said resistance element isdeenergized. In Fig. 4, the switch I33, I31, I36 is closed. When theparts of the heating apparatus are situated as in Fig. 2, said switchwill be open.

Assuming the parts of the heating apparatus to be situated as in Fig. 4,with the resistance element IOI energized and the internal combustionengine of the automotive vehicle in operation, liquid fuel, say, forexample, gasoline mixed with air, will be drawn or pulled or fed fromthe car buretor employed into the combustion chamber I00 through theinlet pipe I35, due to suction created in the intake manifold of saidinternal The combustible fuel mixture of course will be ignited by saidresistance element IDI and caused to burn in said combustion chamberI00. The products of combustion, or hot gases, will pass through thefines of the heating device and traverse the boiler along the fluepassageways or channels hereinbefore described, and will cause fluid orwater in both the inner chamber 94 and the outer, annular chambar I I2of the boiler to .be transformed into steam or hot vapor. Eventually,the products of combustion, when spent and comparatively cool, will passto the intake manifold of the internal combus tion engine. Evidently,steam or hot vapor created in the fluid or :water chambers of the boilerwill rise to the top or upper portion of said boiler and traverse thehollow bosses or protuberances I I0, 1 I, the upper portion of thehollow neck 68, the hollow boss or protuberance 69 and the tubular orpipe support 36 over to theheating unit '25. The steam or hot vaporswill enter the upper tank 26 of the core of saidheatingunit and will,naturally, be forced downwardly into the tubes 28. Here the steam or hotvapors will give up heat to said heating unit and its tubes 28 and fins29 in the general manner as hereinbefore set forth in connection withfluid-cooling or circulating medium from the internal combustion engineof the automotive vehicle 20. And, in addition to giving up heat to thecore of the heatingunit, said steam or hot vapors will becondens-ed insaid core and its tubes by the action of the blower or fan 39, as willbe apparent. The condensed fluid or water, While still imparting heat tothe heating unit and its tubes and fins, will pass downwardly by gravityto the lower tank 21 of the core of said heating unit, and thence thecondensed fluid or water will travel by way of the hollow neck 54, thetube or pipe 53, the hollow boss or protuberance 75, the lower portionof the hollow neck 74 and the hollow bosses or protuberances 16 and HIback into the fluid or water chambers 94 and H2. As hereinbe'fore setforth, said chambers 94 and I l2 are intercommunicating, by way of thelower port H5, as .well as by way of the upper port H6. which the fluidfuel or gasoline heating device as illustrated and described employs iscommonly known as a thermo-syphon system.

When the fluid-cooling or circulating medium of the cooling orcirculating system of the in- 2 ternal combustion engine of theautomotive vehicle 20 is below a set and predetermined temperature at orabove which said fluid-cooling or circulating medium should be toproperly heat the interior space of the body 22 of the automotivevehicle, the control bellows l9 and 85 will be contracted, the switchI36, I37, I36 will be closed, and the upper valve stem and controlplunger will be below and out of the part E34 of the exhaust passageway13!, as in Fig. 4. Supposing the internal combustion engine of theautomotive vehicle 20 to be started up cold with the parts of theheating apparatus positioned as in said Fig. 4, the course of thefluid-cooling or circulating medium of the cooling or circulating systemof the internal combustion engine from the jacket l5 to the heatingapparatus and back to the jacket will be through the fluid or water pipe5'! to the lower control chamber 5i, thence through the opening 63 inthe partition 62 to the upper control chamber 69, and thence through thefluid or water pipe 58 and the connection I 8 back to the jacket l5. Thefluid-cooling or circulating medium cannot at this time pass downwardlythrough the hollow neck M or upwardly through the hollow neck 68 becausesaid hollow necks are completely shut off or closed by the valves 81 and82, respectively, as clearly illustrated in Fig. 4. Naturally, thefluid-cooling or circulating medium from the cooling or ciri,

culating system of the internal combustion engine which passes throughthe control chambers BI and 60 will, upon the heating up of saidfluidcooling or circulating medium due to heating up of the internalcombustion engine by operation thereof, cause the upper control bellowsi9 and the lower control bellows 85 to become heated, and also cause theupper and lower bellows housings 64 and 65 to become heated. In turn,said bel lows housings 64 and '65 will impart heat to the bi-metallicblade I38. However, said control bellows l9 and 85 will remain incontracted condi tions which situate the valves 82 and 81 in the closedconditions of the hollow necks 68 and M, and the bi-metallic blade I38will remain in the closed condition of the switch I36, I31, I35 and thecontrol plunger 80 in the open condition of the exhaust passageway 3|until the temperature of the fluid-cooling or circulating medium of thecooling or circulating system of the internal combustion engine hasbecome heated up to a degree at which it is desirable that fluid orwater of said cooling or circulating system traverse the heating unit25. At such time as this happens,

The system 1 the upper and lower control bellows 19 and-85 will haveexpanded sufiiciently to allow communicating connection between thelower control chamber 5 l and the tube or pipe 53 and between thetubular or pipe support 36 and the upper control chamber 60, and to shutofi communicating connection between the bosses or protuberances TI andB9 and between the bosses or protuberances l5 and 15. Also at this time,the bimetallic blade I38 will have become warped or flexed to open theswitch H5, 137, I35. And additionally at this time, the upper valve stemand control plunger '80 will have entered the part 23 2 of the exhaustpassageway l3! and caused said exhaust passageway to become shut ofl.

During the interval the internal combustion engine is warming up, theheating device operates in the manner and to the purpose as hereinbefore'fully set forth, and when the temperature of the fluid-cooling orcirculating medium of the internal combustion engine cooling orcirculating system becomes sufiiciently warm or hot to properly heat theinterior of the automotive vehicle body 22, operation of said heatingdevice is concluded. That is, the outlet or exhaust passageway I3! isshut off and the resistance element i9! is deenergized; both toterminate the drawing or pulling or feeding of combustible fuel mixtureinto the combustion chamber me and to preclude ignition and burning ofcombustible fuel mixture in said combustion chamber.

While the control bellows T9 and '85 are expanded and hot fluid or wateris being caused to circulate from the jacket I5 to the heating unit 25and back to said jfacket l5, the course of the flow of hot fluid orwater through the mechanism 59 is from the fluid or water pipe 5'! intothe lower control chamber 6! and thence through the tube or pipe 53 intothe lower tank 27 of the core of the heating unit, and from the uppertank 26 of said core into the tubular or pipe support or connection 36and thence through the upper control chamber 69 and the fluid or waterpipe 58 and the connection l8 back to said jacket l5. The opening 63through the partition 82 is of negligible .7 size and does notappreciably lessen the flow of hot fluid or water through the heatingunit 25 when this is being supplied or provided with fluid-cooling orcirculating medium from the internal combustion engine'cooling orcirculating system.

Attention is called to the fact that in the disclosure as made, steam orhot vapor supplied or provided the special heating device of the heatingapparatus is caused to flow or travel downwardly through the heatingunit 25, while hot fluid or water supplied or provided by the cooling orcirculating system of the internal combustion engine of the automotivevehicle 20 is caused to flow or travel upwardly through said heatingunit. As hereinbefore mentioned, the flow or travel last mentioned alsocould be downwardly through the heating unit 25.

Attention also is called to the fact'that should the fluid-cooling orcirculating medium of the cooling or circulating system of the internalcombustion engine of the automotive vehicle 20 become reduced intemperature to extent sufficiently to render said medium unfit forproper heating of the interior space of the body 22 of said automotivevehicle during operation of the internal combustion engine, the parts ofthe heating apparatus will become operated from the positions as in Fig.2 to the positions as in Fig. 4, so. that steam or hot vapor heatingmedium will be supplied or provided for and fed to the heating unit 25by the special heating device.

In the embodiments of the invention illustrated inthe drawings, one ofwhich embodiments hereinbefore has been described, energization anddeenergization of the resistance element II'II is accomplished byemployment of a bi-metallic blade which receives its heat from the hotfluid or water of the internal combustion engine cooling or circulatingsystem and causes a switch, such asthe switch I35, I31, I36, controllinga circuit for said resistance element IEII to be opened and closed.Obviously, the switch employed for controlling the circuit for theresistance element could be opened and closed in some other suitable andconvenient manner, as by utilization of a control bellows I9 or 35 andthe movement thereof to this purpose.

In practical operation of the heating app-aratus, let it be supposed aperson intending to operate the automotive vehicle 29 starts up theengine thereof in winter and when cold, and also closes a switch (notshown) of said heating apparatus which causes the electric motor 38 tobe energized and the blower or fan 39 to be put in operation, In just afew seconds real heat is produced in the automotive vehicle body throughthe instrumentality of steam or hot vapor supplied, provided or fed tothe heating unit 25 by the special heating device. A very short whileafterwards, say when the automotive vehicle has been driven only a shortdistance, the fluid-cooling or circulating medium of the cooling orcirculating system of the internal combustion engine becomessufficiently heated to supply or provide heating medium hot enough tothe purpose of properly warming the interior space of said automotivevehicle body, and control of the heating medium for the heating unit 25is turned over to said internal combustion engine cooling or circulatingsystem and taken away from the special heating device. Later, should thetemperature of the fluid-cooling or circulating medium of the cooling orcirculating system of the internal combustion engine drop to temperatureat which it is unfit to the purpose of properly warming the interiorspace of the automotive vehicle body, control of the heating medium forsaid heating unit 25 is turned back to the special heating device andtaken away from the internal combustion engine cooling or circulatingsystem.

Evidently, the special heating device which the invention presents canbe inexpensively maintained, especially for the reasons that it isrequired to function for only a short period any time it is placed inoperation and that it is but infrequently required to be operated. Atthe same time, said special heating device renders the heating apparatusaltogether efiicient, satisfactory and dependable, particularly becauseof the fact that it is capable of producing quick heat and real heat atthe heating unit 25.

In Figs. 9 and 10 there is disclosed a heating apparatus of modifiedconstruction made according to the invention. This modified heatingapparatus includes a heating unit 25, an electric motor for driving ablower or. fan 39, a casing 4|, an upper control chamber 60, a lowercontrol chamber GI, an upper bellows housing 64, a lower bellows housing65, an upper control bellows IS, an upper valve stem and control plunger88, an L-shape valve 82 with horizontal portion 83 and vertical portion84, a boiler with inner boiler casting 90, intermediate boiler sleeveIii) 9| and outer boiler shell 92, a burner 93, a fixture plate I withexhaust passageway similar to the exhaust passageway I3I, spaced apart,fixed conducting elements I 36, I36, a movable conducting element I31,and a bi-metallic blade I38, all constructed and adapted to function inthe general manner as do the more or less similar parts hereinbeforedescribed.

The boiler of Figs. 9 and 10 is built directly into the heating unit 25,at a side of the motor and blower or fan, the upper tank 26' of the coreof said heating unit being open to upper portions of the fluid or waterchambers of said boiler and lower portions of said fluid or waterchambers of the boiler being open to the lower tank 2'! of said core.The ports IM and II5 are equivalent to the ports H4 and H5 hereinbeforedescribed. The heating device of the structure of Figs. 9 and 10 willinclude flues which traverse the boiler in the general manner as before,described and are adapted to deliver products of combustion, or hotgases, to the exhaust passage leading through the fixture plate I25adapted to have communicating connection with the intake manifold of aninternal combustion engine, such as that of the automotive vehicle 20.

The upper control chamber 6b is connected with the upper tank 25 of theheating unit 25 by a tube or pipe and the lower tank 21 of said heatingunit is connected with the lower control chamber El by a tube or pipe53. The horizontal portion 33' of the valve 82 will control passage ofhot fluid or water from the tube or pipe 36' into the upper controlchamber and the horizontal portion 83 of the valve 81 will controlpassage of hot fluid or water from the lower control chamber 6|,into thetube or pipe 53. Y

The present construction will operate in about the way as alreadydescribed, except that the control bellows I9 and will function tocontro1 only the travel or passage of hot fluid or water from the lowercontrol chamber BI to the tube or pipe 53 and the travel or passage ofhot fluid or water from the tube or pipe 35 to the upper control chamber69, and to cause the exhaust passageway through the fixture plate I25 tobe open when the upper control bellows I9 is contracted and to be shutoff when said upper control bellows is expanded, in about the manner ashereinbefor'e set forth. There of course will be a partition, such as52, with opening, such as 63, between the upper and lower controlchambers 59 and BI. The feed of steam or hot vapor from th boiler intothe upper tank 26 will take place while the burner 83 is operative tosupply heat, and no steam or hot vapor will be fed into said upper tank25' from said boiler when the burner is out of operation and not atsufiicient temperature to supply steam or hot vapor. Said burner 93 willbecome ignited and extinguished substantially in the manner as recitedin connection with the burner 83 and substantially in the same timedrelation to contracting and expanding action of the control bellows I9and 85' as does said burner 93 become ignited and extinguished in timedrelation to the contracting and expanding action of the control bellowsI9 and 85. Steam or hot vapor upon entering the upper tank 25 will beforced down through the tubes of th core of the heating unit 25 and willbecome condensed and pas or flow downwardly by gravity through saidtubes to the lower tank 21, giving up heat to the tubes and fins of saidcore in about th manner as hereinthe disclosure of Figs. 9 and 10,incorporating the heating unit 25', the electric motor for driving theblower or fan 39', the casing CH, the boiler, the burner 93' with itsappurtenances, and the fixture plate I25 of said Figs. 9- and 10, eachof which elements is generally of construction and adapted to functionin the manner as hereinbefore set forth, but omitting other elements ofsaid Figs. 9 and 10. Stated difierently, the heating apparatus of Fig.11 is adapted for employment as an entity independent of the cooling orcirculating system of an internal combustion engine, and omits all ofthe elements of Figs. 9 and 10 which are adapted to the purpose ofcontrolling the circulation of fluid-cooling medium from an internalcombustion engine through said heating apparatus, as well as the controlplunger 88'. Instead, the present heating apparatus is self-contained,or, more explicitly, is a self-contained fuel or fluid fuel or gasolineheated steam or hot vapor heating apparatus which operates in the samgeneral manner as does the equivalent heating apparatus of Figs. 9 and10, except that the heating apparatus of Fig. 11 includes a manuallyoperable valve 851 as a substitute for the control plunger Bil of saidFigs. 9 and 10 for the same purpose as said control plunger. The burner93 is put in operation by manual movement of the valve Bil to the openposition of the exhaust passageway through the fixtur plate 125' and isextinguished by movement Of said valve to the closed position of saidexhaust passageway. As long as the burner of Fig. 11 is apcrating, steamor hot vapor will be fed to the heating unit 25 and when the burner isextinguished the supply of steam or hot vapor to said heating unit willbe discontinued.

Subject matter common to this application and my co-pending application,Serial No. 278,704, filed June 12, 1939, is claimed in said co-pendingapplication.

What is claimed is:

1. A combination heated fluid medium and hot i vapor medium heatingapparatus, comprising a heating unit including a blower adapted to bedriven to cause air to be circulated in contact with said heating unit,means for diverting fluidcooling medium from a circulating system of aninternal combustion engine and for utilizing the diverted fluid-coolingmedium at the heating unit as heated fluid medium for raising thetemperature of said heating unit, said means including a connection forconveying fluid-cooling medium from the internal combustion engine tothe heating unit and a connection for conveying fluidcooling medium fromsaid heating unit to said internal combustion engine, an upstandingboiler built into said heating unit and adapted to communicatetherewith, a burner for heating said boiler to provide hot vapor mediumfor raising the temperature of said heating unit, a connection betweenan upper portion of said boiler and said heating unit for directing flowof hot vapor medium from the boiler to the heating unit, a

connection between said heating unit and a lower portion of said boilerfor directing flow of fluid medium from the heating unit to the boiler,said burner being adapted to be operative to heat said boiler totransform fluid medium therein to hot vapor medium and said hot vapormedium being adapted to travel to said heating unit and there becomecondensed and to return to said boiler, means for causing said burner tobe operative to heat said boiler when said diverted fluid-cooling mediumis at relatively lower temperatures and to be incapable of impartingheat to the boiler when the diverted fluid-cooling medium is atcomparatively higher atemperatures, and means for causing saidconnections for conveying fluidcooling medium from said internalcombustion engine to said heating unit and from the heating unit to theinternal combustion engine to b shut off when said burner is operativeto heat said boiler and to be open when said burner is incapable ofimparting heat to said boiler.

2. A combination heated fluid medium and hot vapor medium heatingapparatus, comprising a heating unit including a blower adapted to bedriven to cause air to be circulated in contact with said heating unit,means for diverting fluidcooling medium from a circulating system of aninternal combustion engine and for utilizing the diverted fluid-coolingmedium at the heating unit as heated fluid medium for raising thetemperature of said heating unit, said means including a connection forconveying fluid-cooling medium from the internal combustion engine tothe heating unit and a connection for conveying fluid-cooling mediumfrom said heating unit to said internal combustion engine, a pluralityof control bellows including a control bellows in each of said mentionedconnections and adapted to be expanded in response to increase oftemperature of the fluid-cooling medium and to be contracted in responseto decrease of temperature of said fluid-cooling medium, a plurality ofvalve means including a valve in each of said mentioned connectionsadapted to be actuated 7 by each ofsaid control bellows, a boileradapted to contain fluid medium, a burner for heating said boiler toprovide hot vapor medium for raising the temperature of said heatingunit, a connection for directing flow of hot vapor medium from theboiler to the heating unit, a connection for directing flow of fluidmedium from said heating unit to said boiler, said burner being adaptedto be operative to heat said boiler to transform fluid medium therein tohot vapor medium and said hot vapor medium being adapted to travel tosaid heating unit and there become condensed and to return to saidboiler, and means for causing said burner to be operative to heat saidboiler When said control bellows are in relatively contracted conditionsand to be incapable of imparting heat to the boiler when the controlbellows are in comparatively expanded conditions, said valves beingadapted to cause said connections for conveying fluid-cooling mediumfrom said internal combustion engine to said heating unit to be openwhen said burner is incapable of imparting heat to said boiler and to beshut olT when said burner is operative to heat said boiler.

HARRY ROSE.

